4. Research
Our group aims to develop consistent, rational, and practical unified geotechnical interpretation frameworks for evaluating soil parameters based on both in-situ, geophysical, and laboratory tests. For instance, a focused area centers on the measurement, evaluation, and application of elastic waves (e.g., shear wave velocity (VS) and the related small-strain stiffness (G0) in soils), with particular interests related to geotechnical site characterization. In terms of the seismic wave-based geo-characterization, some recent applications and current/potential research projects are introduced.
Advanced Geotechnical & Geophysical Site Characterization
Underground mapping AND geo-stratigraphy delineation:
exploring efficient AND optimized site exploration strategy with application of advanced technologies
Non-invasive technique
- Non-invasive Geophysical Study with MASW, MAM, MM (HVSR)
- A new geophysical approach with seismic interferometry
Continuous & refined underground survey/scan
- Seismic cross-hole tomography for near-surface site investigation
- Continuous-interval Vs profiling by auto-source and seismic piezocone tests
Unified characterization of soil properties and mechanical behaviours:
developing frameworks for simple and accurate estimations/applications
In-situ VS-based global correlation study for evaluating soil properties
- Seismic wave (mainly Vs-based) approach for estimating soil properties: soil density (unit weight), undrained shear strength
- Geostatic stress state & stress history evaluation by paired directional shear waves
Laboratory-based geo-characterization with Elastic Wave velocity monitoring
- Lab-scale mechanical wave application study: e.g., new interpretation methods of BE signals, anisotropy study using directional signals.
- Strength characteristics of cemented soil and non-destructive (seismic wave) monitoring: e.g., ground improvement study with new cement agent (CSA), binary mixture, and other fundamental variables on the stiffness / strength evolution.